Windup window shade with variable shading effect

US6695381B2 · kind B2 · utility

Assignee

• BOS GMBH & CO. KG · DE

Inventors

• Werner Schlecht · Aurich, DE
• Herbert Walter · Großenhain, DE

Key dates

• Filing date: Nov 21, 2001
• Grant date: Feb 24, 2004
• Expiry date: Jan 31, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60J1/208
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A windup window shade is provided with windup window shade means which, in the extracted state, make possible different degrees of opacity at the window. To this end, the two window shade web can either be wound on separate windup shafts and spread out in the same direction from the same starting point, or the two window shade webs have been connected with each other and, after having been extended, are moved in the manner of a film in front of the window. Two windup shafts are employed in both cases, wherein in the one case the two windup shafts are located directly next to each other, while in the other case the windup shafts are separated from each other during the extension of the shade.